The present study was carried out to assess the effect of floor space allowance on performance and behaviour of weaned lambs. Eighteen weaned Magra lambs (Male) the age group of 3-7 months body weight 7-8 kg were randomly devided into three different groups and viz., T0.8, T0.6 and T1. The selected lambs were kept into three different groups with different floor space comprising of 6 lambs in each group. Group T0 (0.8 m2 floor space/ lamb), Group T1 (0.6 m2/ lamb) and Group T2 (1 m2/ lamb). The feeding and other management practices for all the three groups were similar. The body weight of lambs at 3 and 6 months of age was 13.53, 13.57, 13.75 and 19.09, 18.65, 19.79 kg respectively in Group T0, T1 and T2. The average daily gain and average weekly gain in body weight were 66.22 ± 1.106, 60.44 ± 1.755 and 71.85 ± 0.82 gm/day and 463.47b ± 48.33, 423.05a ± 38.30 and 502.92c ± 42.23 gm/wk in Group T0, T1 and T2 respectively. There was significant effect of floor space on average daily gain (P<0.01), average weekly gain (P<0.01) and also on average monthly gain (P<0.05) of Magra lambs. It was concluded that provision of floor space is positively correlated with the growth performance of lambs. 

Highlights

• There was positive significant correlation found between growth rate and morphometric traits in lambs housed in groups with different floor space.
• Provision of floor space was positively correlated with the growth performance of lambs.